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https://www.readbyqxmd.com/read/28079511/circulating-carotenoids-and-subsequent-risk-of-rheumatoid-arthritis-in-women
#1
Yang Hu, Jing Cui, Jeffrey A Sparks, Susan Malspeis, Karen H Costenbader, Elizabeth W Karlson, Bing Lu
OBJECTIVES: The aim of the present study was to examine the associations between circulating carotenoids and future risk of rheumatoid arthritis (RA). METHODS: We conducted a nested case-control study consisting of 227 incident RA cases and 671 matched controls with prospectively measured plasma carotenoids (α-carotene, β-carotene, β-cryptoxanthin, lycopene and lutein/zeaxanthin) levels in the Nurses' Health Study (NHS) and Nurses' Health Study II (NHS II). Each incident RA case was matched with 3 healthy controls...
January 4, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28074337/economic-burden-of-rheumatoid-arthritis-in-italy-possible-consequences-on-anti-citrullinated-protein-antibody-positive-patients
#2
Francesco Saverio Mennini, Andrea Marcellusi, Lara Gitto, Florenzo Iannone
BACKGROUND: Rheumatoid arthritis (RA) is an autoimmune disease with a substantial medical and economic burden. In Italy, it affects approximately 280,000 people, therefore representing the musculoskeletal disease with the highest economic impact in terms of costs for the National Health Service and the social security system. OBJECTIVE: The aim of this study was to estimate the annual economic burden of RA in Italy and determine the potential cost reduction considering the most effective biologic treatment for early rapidly progressing RA (ERPRA) patients...
January 10, 2017: Clinical Drug Investigation
https://www.readbyqxmd.com/read/28073956/the-effect-of-rheumatoid-arthritis-associated-autoantibodies-on-the-incidence-of-cardiovascular-events-in-a-large-inception-cohort-of-early-inflammatory-arthritis
#3
Lillian J Barra, Janet E Pope, Carol Hitchon, Gilles Boire, Orit Schieir, Daming Lin, Carter J Thorne, Diane Tin, Edward C Keystone, Boulos Haraoui, Shahin Jamal, Vivian P Bykerk
OBJECTIVE: RA is associated with an increased risk of cardiovascular events (CVEs). The objective was to estimate independent effects of RA autoantibodies on the incident CVEs in patients with early RA. METHODS: Patients were enrolled in the Canadian Early Inflammatory Arthritis Cohort, a prospective multicentre inception cohort. Incident CVEs, including acute coronary syndromes and cerebrovascular events, were self-reported by the patient and partially validated by medical chart review...
January 9, 2017: Rheumatology
https://www.readbyqxmd.com/read/28043998/presence-of-anticitrullinated-protein-antibodies-in-a-large-population-based-cohort-from-the-netherlands
#4
A van Zanten, S Arends, C Roozendaal, P C Limburg, F Maas, L A Trouw, R E M Toes, T W J Huizinga, H Bootsma, E Brouwer
OBJECTIVES: To determine the prevalence of anticitrullinated protein antibodies (ACPAs) and their association with known rheumatoid arthritis (RA) risk factors in the general population. METHODS: Lifelines is a multidisciplinary prospective population-based cohort study in the Netherlands. Cross-sectional data from 40 136 participants were used. The detection of ACPA was performed by measuring anti-CCP2 on the Phadia-250 analyser with levels ≥6.2 U/mL considered positive...
January 2, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/28028684/are-obesity-acpas-and-periodontitis-conditions-that-influence-the-risk-of-developing-rheumatoid-arthritis-in-first-degree-relatives
#5
Sonia Unriza-Puin, Wilson Bautista-Molano, Gloria I Lafaurie, Rafael Valle-Oñate, Philippe Chalem, Lorena Chila-Moreno, Juan Manuel Bello-Gualtero, Consuelo Romero-Sánchez
The aim of this study was to investigate the body mass index (BMI), anti-citrullinated protein antibodies (ACPAs) status and the presence of periodontitis and IgG-1/IgG-2 antibodies against Porphyromonas gingivalis (Pg) in the first-degree relatives (FDRs) of rheumatoid arthritis (RA) patients and compare these variables with a control group of healthy individuals from the general population. In total, 100 FDR individuals and 200 healthy controls matched by age and gender were included. Rheumatologic and periodontal assessment was performed, and the presence of ACPAs and anti-P...
December 28, 2016: Clinical Rheumatology
https://www.readbyqxmd.com/read/28028155/abatacept-reduces-disease-activity-and-ultrasound-power-doppler-in-acpa-negative-undifferentiated-arthritis-a-proof-of-concept-clinical-and-imaging-study
#6
Maya H Buch, Elizabeth M A Hensor, Chadi Rakieh, Jane E Freeston, Edward Middleton, Sarah Horton, Sudipto Das, Charles Peterfy, Ai Lyn Tan, Richard J Wakefield, Paul Emery
OBJECTIVES: No proven treatment exists for ACPA-negative undifferentiated arthritis (UA). The aim of this study was to evaluate whether abatacept is effective in treating poor prognosis, ACPA-negative UA, including its effect on power Doppler on US (PDUS). METHODS: A proof-of-concept, open-label, prospective study of 20 patients with DMARD-naïve, ACPA-negative UA (⩾2 joint synovitis) and PDUS ⩾ 1 with clinical and 20-joint US (grey scale/PDUS) assessments at baseline, 6, 12, 18 and 24 months...
January 2017: Rheumatology
https://www.readbyqxmd.com/read/28013195/nicotine-drives-neutrophil-extracellular-traps-formation-and-accelerates-collagen-induced-arthritis
#7
Jaejoon Lee, Ayala Luria, Christopher Rhodes, Harini Raghu, Nithya Lingampalli, Orr Sharpe, Balazs Rada, Dong Hyun Sohn, William H Robinson, Jeremy Sokolove
OBJECTIVES: The aim was to investigate the effects of nicotine on neutrophil extracellular traps (NETs) formation in current and non-smokers and on a murine model of RA. METHODS: We compared spontaneous and phorbol 12-myristate 13-acetate-induced NETosis between current and non-smokers by DNA release binding. Nicotine-induced NETosis from non-smokers was assessed by DNA release binding, NET-specific (myeloperoxidase (MPO)-DNA complex) ELISA and real-time fluorescence microscopy...
December 24, 2016: Rheumatology
https://www.readbyqxmd.com/read/28002483/physical-characteristics-of-a-citrullinated-pro-filaggrin-epitope-recognized-by-anti-citrullinated-protein-antibodies-in-rheumatoid-arthritis-sera
#8
Nicole Hartwig Trier, Bettina Eide Holm, Ole Slot, Henning Locht, Hanne Lindegaard, Anders Svendsen, Gunnar Houen
Rheumatoid arthritis (RA) is an autoimmune disease of complex etiology. A characteristic feature of a subset of RA is the presence of anti-citrullinated protein antibodies (ACPA), which correlate with a progressive disease course. In this study, we employed streptavidin capture enzyme-linked immunosorbent assay to analyze ACPA reactivity. Using the pro-filaggrin peptide HQCHQEST-Cit-GRSRGRCGRSGS, as template, we analyzed the reactivity of RA sera and healthy donor sera to various peptides in order to determine the physical characteristics of the citrullinated pro-filaggrin epitope and to examine whether biotin labelling influence antibody recognition...
2016: PloS One
https://www.readbyqxmd.com/read/27994093/association-of-anti-citrullinated-protein-or-peptide-antibodies-with-left-ventricular-structure-and-function-in-rheumatoid-arthritis
#9
Laura Geraldino-Pardilla, Cesare Russo, Jeremy Sokolove, William H Robinson, Afshin Zartoshti, Jenny Van Eyk, Justyna Fert-Bober, Joao Lima, Jon T Giles, Joan M Bathon
OBJECTIVE: High levels of ACPAs in RA are associated with more severe arthritis and worse prognosis. However, the role of ACPAs in mediating the increased risk of heart failure in RA remains undefined. We examined whether specific ACPAs were associated with subclinical left ventricular (LV) phenotypes that presage heart failure. METHODS: Sera from RA patients without clinical cardiovascular disease were assayed for specific ACPAs using a custom Bio-Plex bead assay, and their cross-sectional associations with cardiac magnetic resonance-derived LV measures were evaluated...
December 19, 2016: Rheumatology
https://www.readbyqxmd.com/read/27986080/erratum-to-prevalence-sensitivity-and-specificity-of-antibodies-against-carbamylated-proteins-in-a-monocentric-cohort-of-patients-with-rheumatoid-arthritis-and-other-autoimmune-rheumatic-diseases
#10
Arbi Pecani, Cristiano Alessandri, Francesca Romana Spinelli, Roberta Priori, Valeria Riccieri, Manuela Di Franco, Fulvia Ceccarelli, Tania Colasanti, Monica Pendolino, Riccardo Mancini, Simona Truglia, Cristiana Barbati, Marta Vomero, Danilo Sabatinelli, Francesca Morello, Guido Valesini, Fabrizio Conti
Anti-CarP antibodies were detected in 117 patients with RA (37.9%), ACPA in 190 patients (61.4%) and RF in 202 patients (65.3%). Two (2.04%) of the NHS were positive for anti-CarP, one NHS (1.02%) was positive for ACPA and three NHS were positive for RF (3.06%). Among disease controls, anti-CarP antibodies were detected in 33 patients (16.5%), ACPA in 29 patients (14.5%) and RF in 64 patients (32%). In particular, 16.8% of patients with systemic lupus erythematosus and 31.1% of patients with Sjögren syndrome were positive for anti-CarP...
December 16, 2016: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/27974851/mechanisms-leading-from-systemic-autoimmunity-to-joint-specific-disease-in-rheumatoid-arthritis
#11
REVIEW
Anca I Catrina, Camilla I Svensson, Vivianne Malmström, Georg Schett, Lars Klareskog
A key unanswered question in the pathophysiology of rheumatoid arthritis (RA) is how systemic autoimmunity progresses to joint-specific inflammation. In patients with seropositive RA (that is, characterized by the presence of autoantibodies) evidence is accumulating that immunity against post-translationally modified (such as citrullinated) autoantigens might be triggered in mucosal organs, such as the lung, long before the first signs of inflammation are seen in the joints. However, the mechanism by which systemic autoimmunity specifically homes to the joint and bone compartment, thereby triggering inflammation, remains elusive...
December 15, 2016: Nature Reviews. Rheumatology
https://www.readbyqxmd.com/read/27956708/structural-analysis-of-variable-domain-glycosylation-of-anti-citrullinated-protein-antibodies-in-rheumatoid-arthritis-reveals-the-presence-of-highly-sialylated-glycans
#12
Lise Hafkenscheid, Albert Bondt, Hans U Scherer, Tom W J Huizinga, Manfred Wuhrer, René E M Toes, Yoann Rombouts
Recently, we showed the unexpectedly high abundance of N-linked glycans on the Fab-domain of Anti-Citrullinated Protein Antibodies (ACPA). As N-linked glycans can mediate a variety of biological functions, we now aimed at investigating the structural composition of the Fab-glycans of ACPA-IgG to better understand their mediated biological effects. ACPA-IgG and non-citrulline specific (control) IgG from plasma and/or synovial fluid of nine ACPA positive rheumatoid arthritis patients were affinity purified. The N-linked glycosylation of total, Fc and F(ab)2 fragments, as well as heavy and light chains of ACPA-IgG and control IgG were analyzed by UHPLC and MALDI-TOF mass spectrometry...
December 12, 2016: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/27939764/elevated-bmi-and-antibodies-to-citrullinated-proteins-interact-to-increase-rheumatoid-arthritis-risk-and-shorten-time-to-diagnosis-a-nested-case-control-study-of-women-in-the-nurses-health-studies
#13
Sara K Tedeschi, Jing Cui, Elizabeth V Arkema, William H Robinson, Jeremy Sokolove, Nithya Lingampalli, Jeffrey A Sparks, Elizabeth W Karlson, Karen H Costenbader
OBJECTIVE: Overweight/obesity and anti-citrullinated protein antibodies (ACPA) increase rheumatoid arthritis (RA) risk. We investigated the relationship between body mass index (BMI) and ACPA, tested for an interaction between BMI and ACPA for RA risk, and examined effects of BMI and ACPA on time to RA diagnosis. DESIGN: Within the Nurses' Health Studies, blood samples were collected before diagnosis from medical record-confirmed incident RA cases and matched controls...
September 13, 2016: Seminars in Arthritis and Rheumatism
https://www.readbyqxmd.com/read/27916980/the-immunopathogenesis-of-seropositive-rheumatoid-arthritis-from-triggering-to-targeting
#14
Vivianne Malmström, Anca I Catrina, Lars Klareskog
Patients with rheumatoid arthritis can be divided into two major subsets characterized by the presence versus absence of antibodies to citrullinated protein antigens (ACPAs) and of rheumatoid factor (RF). The antibody-positive subset of disease, also known as seropositive rheumatoid arthritis, constitutes approximately two-thirds of all cases of rheumatoid arthritis and generally has a more severe disease course. ACPAs and RF are often present in the blood long before any signs of joint inflammation, which suggests that the triggering of autoimmunity may occur at sites other than the joints (for example, in the lung)...
January 2017: Nature Reviews. Immunology
https://www.readbyqxmd.com/read/27912794/a-genetic-risk-score-composed-of-rheumatoid-arthritis-risk-alleles-hla-drb1-haplotypes-and-response-to-tnfi-therapy-results-from-a-swedish-cohort-study
#15
Xia Jiang, Johan Askling, Saedis Saevarsdottir, Leonid Padyukov, Lars Alfredsson, Sebastien Viatte, Thomas Frisell
BACKGROUND: To prevent debilitating and irreversible joint damage, rheumatoid arthritis (RA) is often treated with tumor necrosis factor inhibitor (TNFi), but many patients do not respond to this costly therapy. Few predictors for response are known, and it has been proposed that genetic factors which influence the development of RA may also influence disease severity and response to therapy. Several previous studies have attempted to confirm this but results remain inconclusive. We expand on previous studies by including more RA risk alleles, and maximize power by combining them into a genetic risk score...
December 3, 2016: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/27911913/effect-of-osteoprotegerin-and-dickkopf-related-protein-1-on-radiological-progression-in-tightly-controlled-rheumatoid-arthritis
#16
Carmen Gómez-Vaquero, Irene Martín, Estibaliz Loza, Loreto Carmona, José Ivorra, José Antonio Narváez, Javier Hernández-Gañán, Pedro Alía, Javier Narváez
OBJECTIVE: To analyze the association between circulating osteoprotegerin (OPG) and Dickkopf-related protein 1 (DKK-1) and radiological progression in patients with tightly controlled rheumatoid arthritis (RA). METHODS: Serum levels of OPG and DKK-1 were measured in 97 RA patients who were treated according to a treat-to-target strategy (T2T) aimed at remission (DAS28<2.6). Radiologic joint damage progression was assessed by changes in the total Sharp-van der Heijde score (SHS) on serial radiographs of the hands and feet...
2016: PloS One
https://www.readbyqxmd.com/read/27906052/antibody-responses-to-de-novo-identified-citrullinated-fibrinogen-peptides-in-rheumatoid-arthritis-and-visualization-of-the-corresponding-b-cells
#17
Vijay Joshua, Loes Schobers, Philip J Titcombe, Lena Israelsson, Johan Rönnelid, Monika Hansson, Anca I Catrina, Ger J M Pruijn, Vivianne Malmström
BACKGROUND: Antibodies against citrullinated proteins (ACPA) are common in patients with rheumatoid arthritis (RA). ACPA can appear before disease onset and target many self-antigens. Citrullinated fibrin/fibrinogen represents a classical ACPA target antigen, and mass spectrometry of RA synovial fluid reveals elevated citrullinated (cit) fibrinogen (Fib) peptides compared to non-RA controls. We investigated the extent to which these less-studied peptides represent autoantibody targets and sought to visualize the corresponding cit-Fib-reactive B cells in RA patients...
December 1, 2016: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/27906045/smoking-is-associated-with-the-concurrent-presence-of-multiple-autoantibodies-in-rheumatoid-arthritis-rather-than-with-anti-citrullinated-protein-antibodies-per-se-a-multicenter-cohort-study
#18
Tineke J van Wesemael, Sofia Ajeganova, Jennifer Humphreys, Chikashi Terao, Ammar Muhammad, Deborah P M Symmons, Alex J MacGregor, Ingiäld Hafström, Leendert A Trouw, Annette H M van der Helm-van Mil, Tom W J Huizinga, Tsuneyo Mimori, René E M Toes, Fumihiko Matsuda, Björn Svensson, Suzanne M M Verstappen, Diane van der Woude
BACKGROUND: The contribution of smoking to rheumatoid arthritis (RA) is hypothesized to be mediated through formation of anti-citrullinated protein antibodies (ACPA). In RA, however, autoantibodies such as ACPA, rheumatoid factor (RF), and anti-carbamylated protein antibodies (anti-CarP) often occur together, and it is thus unclear whether smoking is specifically associated with some autoantibodies rather than others. We therefore investigated whether smoking is only associated with ACPA or with the presence of multiple RA-related autoantibodies...
December 1, 2016: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/27900357/datasets-of-yy1-expression-in-rheumatoid-arthritis-patients
#19
Jinpiao Lin, Yujue He, Junmin Chen, Zhiyong Zeng, Bin Yang, Qishui Ou
The data presented in this article are related to the research article entitled "A critical role of transcription factor YY1 in rheumatoid arthritis by regulation of interleukin-6" (J. Lin, Y. He, J. Chen, Z. Zeng, B. Yang, Q. Ou, 2016) [1]. The article describes YY1 overexpression is specific for RA, but not for SLE, SS, DM or MCTD. In early RA, YY1 expression is also increased. In asymptomatic subjects with RF or ACPA positive who have high risk for developing RA, the YY1 expression is not increased obviously...
December 2016: Data in Brief
https://www.readbyqxmd.com/read/27895639/netosis-as-source-of-autoantigens-in-rheumatoid-arthritis
#20
REVIEW
Elisa Corsiero, Federico Pratesi, Edoardo Prediletto, Michele Bombardieri, Paola Migliorini
In neutrophils (but also in eosinophils and in mast cells), different inflammatory stimuli induce histone deimination, chromatin decondensation, and NET formation. These web-like structures that trap and kill microbes contain DNA, cationic granule proteins, and antimicrobial peptides, but the most abundant proteins are core histones. Histones contained in NETs have been deiminated, and arginines are converted in citrullines. While deimination is a physiological process amplified in inflammatory conditions, only individuals carrying genetic predisposition to develop rheumatoid arthritis (RA) make antibodies to deiminated proteins...
2016: Frontiers in Immunology
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